Problem with Plex

I get the message "Conversion failed. The transcoded crashed or failed to start up. I just signed up with Plex and looks like I’ll have to cancel.

You have a pretty good chance of getting help if you post enough info:
Server hardware
Client
Network
exact error and where and when you get it
and probably most important logs see:
https://support.plex.tv/hc/en-us/articles/200250417-Plex-Media-Server-Log-Files
Just attach the resulting ZIP file to a post here.